Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697049 | Radio relay method, radio relay system using the method and radio unit | Mitsuo Shiraishi, Sakari Ohira | 1997-12-09 |
| 5633862 | DTMF signal transmission method in single frequency simultaneous transmitting and receiving system and single frequency simultaneous transmitting and receiving system transceiver capable of transmitting DTMF signal | Kenichi Suzuki, Sakari Ohira, Osamu Suzuki | 1997-05-27 |